He estimated how many species of insects lived on each plant species in England, and then extrapolated that figure across the whole planet. âIf we say 400,000, we shall, perhaps, not be very wide of the truth,â he wrote. Today, scientists know the Westwood figure is far too low.
Symptoms: A chronic dry cough that's worse at night, disturbing sleep, and sometimes with wheezing and shortness of breath. Causes: An irritating night cough is often the first sign of asthma, especially in children, but you can develop it at any age. It's also a sign asthma is worsening or not being well controlled.
How Sleep Apnea Worsens Asthma. Allergies. Obstructive sleep apnea syndrome, or simply sleep apnea, is a disease process caused by repeated episodes of closing of the upper airway during sleep, resulting in the reduction of airflow and oxygen to the lungs. This can lead to low oxygen levels in the blood stream, gasping episodes and frequent nighttime awakenings. Most people with obstructive sleep apnea snore loudly, stop breathing during sleep, and have episodes of gasping, choking, gagging and coughing.